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A highly radioactive element with no stable isotopes. It was discovered by Pierre and Marie Curie. It was named after Polonia, which at that time was not an indepedent country. It is an alpha emitter with a half-life of 138.4 days. As an alpha emitter, its radiation can be stopped by a thin sheet of paper, but when swallowed will cause extreme tissue damage.
Curie Polonia Marie Prussia USSR Pierre Czechoslovakia Alexander Litvinenko Danzig